Don't harass people using them.
Even if you can't see how that person might have a disability.
Even if you think they look "fine".
Even if they're not using an obvious mobility aid.
You don't know them, you don't know their story.
There's a woman I met recently in the waiting room at my doctor's. She has constant crippling chronic pain. Walking sucks. Standing sucks. Carrying things sucks. If she wants to do her shopping she only has a very limited amount of time before she has no energy left, so she has a sticker to let her park in disability spaces. Because her disability means she needs them.
But she can walk just fine so she doesn't carry a cane or anything.
So she got harassed by some ablebodied people who took one look at her and assumed she didn't need that sticker or that parking space.
Don't do that. If you do that you are not helping. You are hurting.
She should not have to prove her credentials. She did not owe those assholes an explanation about her medical diagnosis.
She definitely did not deserve getting namecalled and intimidated and harassed by some people who wanted to be bullies for their ""good deed for the day"".
So before you hassle someone for using a disability space, unless you are personally acquainted with that person's medical history because you're just that close to them, please don't.
You're definitely not helping me out by hurting others who have less visible disability.